Reserves for Future Policy Benefits (Details) - USD ($) $ in Millions	3 Months Ended
	Mar. 31, 2022	Mar. 31, 2021	Dec. 31, 2021	Dec. 31, 2020
Movement in Liabilities for Guarantees on Long-Duration Contracts, Guaranteed Benefit Liability, Gross [Roll Forward]
Reserve for future policy benefits	$ 582		$ 596
Ending liability balance	582
Annuaitization Benefit
Movement in Liabilities for Guarantees on Long-Duration Contracts, Guaranteed Benefit Liability, Gross [Roll Forward]
Reserve for future policy benefits	582	$ 641	$ 596	$ 638
Incurred	36	37
Paid	39	26
Change in unrealized investment gains and losses	(11)	(8)
Ending liability balance	582	641
Movement in Liabilities for Guarantees on Long-Duration Contracts, Reinsurance Recoverable [Roll Forward]
Ending reinsurance recoverable asset	$ 26	$ 46